n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 36 |
5 | 216 |
6 | 1020 |
7 | 8160 |
8 | 61920 |
9 | 507744 |
10 | 4383392 |
11 | 52600704 |
12 | 624249600 |
13 | 8739494400 |
14 | 109190390400 |
15 | 1583122968000 |
16 | 25318378008000 |
17 | 455730804144000 |
18 | 8193040840252800 |
19 | 163860816805056000 |
20 | 3256371347261760000 |
21 | 67204676251838361600 |
22 | 1366492477414792734720 |
[1,3,12,36,216,1020,8160,61920,507744,4383392, 52600704,624249600,8739494400,109190390400, 1583122968000,25318378008000,455730804144000, 8193040840252800,163860816805056000, 3256371347261760000,67204676251838361600, 1366492477414792734720] |